[jira] [Created] (NUMBERS-90) DoublePrecisionContext

["Matt Juntunen (JIRA)" <ji...@apache.org>]

Matt Juntunen created NUMBERS-90:
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             Summary: DoublePrecisionContext
                 Key: NUMBERS-90
                 URL: https://issues.apache.org/jira/browse/NUMBERS-90
             Project: Commons Numbers
          Issue Type: New Feature
            Reporter: Matt Juntunen


We should add a new class to commons-numbers-core that encapsulates configurable strategies for comparing doubles. This is required for GEOMETRY-11. Here is what I'm picturing:
{code:java}
// abstract class for the general concept of comparisons
public abstract class DoublePrecisionContext implements Comparator<Double> {
    public abstract boolean equals(double a, double b);

    public int compare(double a, double b) { /* ... */ }
    public int compare(Double a, Double b) { /* ... */ }
}

// ...

// concrete class implementing a specific strategy
public class EpsilonUlpDoublePrecisionContext extends DoublePrecisionContext {
    public EpsilonUlpDoublePrecisionContext(double eps, double maxUlps) { /* ... */ }

    @Override
    public boolean equals(double a, double b) { /* ... */ }
} 
{code}



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